Hot-air engine.



SEARCHEQOM CROSS RFRNCE No. 820,495. Y PATENTBD MAY 15 1906. W. R. HNEYWELL.

HOTfAIR ENGINE. Arrmoulox Hmm JULY 14.1904.

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cRoss RFRENCE SEARCH .110.820,495. w l l PATENTBDMAY15,1906.

w. R. HONEYWELL.

UNITED STATES PATENT OFFICE.

mLIAM'REoHAB HONEYWELL, OF TORONTO, CANADA.

HOT-AIR ENGINE.

To all whom it may concern:

Be it known that I, WILLIAM RCHAB HONEYWELL, inventor, a subject of the King of Great Britain, residing in the city of TO- ronto, in the county of York and Province of Ontario, Canada, have invented certain new and useful Im rovements in Hot-Air Engines, of which the allowing is a specification.

y mventionrelates 'to improvements in hot-air engines and one object of my invention is to design a simple and com aratively cheap-engine of this class that w11 develop the maximum amount of ower.

Anothervobject is to @sign a particular form of valve and port opened and closed by same.

A still further object is in my preferred form of invention to design a articular feedling-plug so that fuel may be ed to the' comustion-chamber at all times; and it consists, essentially, of the cylinder rovided with an exhaust-port and an inta 'e-port, -and the piston connected to the engine-shaft, heating means for the air, and a pressure-valve operated to4 open and close the port between said heatin4 means and said cylinder, and other detail of construction, as hereinafter more particularly explained. y invention is of course applicable to two-c cle or four-cycle engines.

Although I preferably heat the air by means of fuel-such as wood, coal, or char- Specification of Letters Patent. Application filed July 14, 1904- Serial Io. 216,515.

1 quently Opens same.

vc'oal--fed into the combustion-chamber, I of course may heat the air by means of electricity or liquid fuel.' When fuel is used O f .he nature above mentioned in the heati chamber, the fire is built therein in the ordinary manner, and as there will alwa s be a oodly su ply of oxygen within the said cornustion-c amber the fuel Will be consumed. It will be understood by one skilled in this art that the combustionv is a continuous one. l Figure Lis a longitudinal vertical section 4through my engine. Fi 2 is-a horizontal section on the line e b, ig. 1. Fig. 3 is an enlarged plan view of part of the cylinder, showin feed and exhaust ports.

verticacrOss-section on the line c d, Fig. 3. 5 is 'an enlarged vertical section through the pressure-valve.

In the drawings like characters of refervence indicate `corresponding parts in each re. Ais the cylinder, in which operates the pis- '5 tion B, connected oy .its rod w1 th the shaft Fig. 4 is a- Patented may 15, 190e.'

D, on which is the ily-wheel D. By means of an induction-valve E air passes mto the lcrank-case F during inward movement of the piston meut of same through the port G in saidcrank-case and into the conduit I and thence into the cylinderA through the ports H. As the piston goes inward the Orts H are closed and the fresh air is forced t ough the ori. J into the combustion or heating cham er K by the opening of the valve L of said port. The compressed air always enters the port J below the end of As soon as the airpressure falls below the strength of the spring I the valve L is closed, thus retaining the air within the chamber K. When the engine is first started, it will be understood that it acts merely as an air-pump, so as to get the required pressure o f air Within the chamber K. When the required air pressure is reached, the fresh su ply of air into the chamber K by the inwar' movement ofthe piston B will raise the pressure of the air high enough so that immediately the said piston has reached the limit of its inward movement, the port J being o en, the air-pressure within the chamber K will be so great as to hold the valve J up, and thus penmt'a quantity of hot air to pass into the cylinder A and force the piston outward, thus doing work. As vsoon as the piston reaches the limit of its outward movement the air escapes from said cylinder through the exhaust-ports N into the exhaust-pi e 0. Of course when the pressure within t e chamber K falls below a certain point-the valve L closes the closing of the port J will Of course take place before the exhaust-ports N are opened. As the ports H and N are preferably opened and closed simultaneously, it will be understood that because of its greater pressure the spent air will exhaust through the ports N, an the fresh air as soon as the ressure within the cylinder A is low enou lpasses thereinto t ough the ports H, willie open from the conduit I. I is any suitable cap for covering the conduit I and is suitably secured to the cylinder A. As will be seen end l of the valve L is below the receiving end of the part of the ort J between sai valve and said chamber 1%, so that no matter how great the air-pressure may be withm saidchamber the valve J cannot be opened by same..`

D, and is forced by the outward movethe valve L, and conseport J. The l IOO from Fig. 1, the

' screwing onto the upper part A of the same the housing Q,

. its shank 4 the said casi that forms the combustion or heating cham er is a housing Q, in which the upper end of the valve L operates. In the conistruction shown I rovide the said valve with a spindle m,'on which and within said housing Q 1s contained the spring M, that keeps thel valve L in normal position. By means of a chambered cap S, 'screwing onto the top of the tension of the spring M is regulated. The s indle m asses u through the cap S and the bracket suitab yusecued to the engine-rame- By means of any suitable adjustable stops o and o on the spindle mthe range of movement of the valve L is regulated. Within the housing Q is a gland U, between which and the gland V is packing W, and between the Gland V and the construction P is packing Held on the u per part of the chamber K is a hollow circullxlr tapered plug 2, by means of which the fuel is fed thereinto. The uel is placed in the chamber 3, and by means of lug is turned until the contents of said cham er 3 are emptied into said chamber. The lug is then returned to normal position. y this construction of plug it wi l be understood that fuel can be fed at all times into said chamber. By means of the gland 5 screwing into the cap 6, suitably secured to said chamber K, said plug is held snugly in place.

In order that the chamber K may always' withstand the pressure, I surround same w ith a water-casing 7 (suitably secured at its which register with t lower edge to the bottom 8,' to which bottom is suitably secured the chamber K) and suitably secured at its upper edge to the upper art A of the combustion-chamber casting.

he inner end of the cylinder A extends Within the casing 7 (to which casing it is suitably securedl and is of course surrounded by the water.

The gland V is provided with holes v, e slots or holes 'v' in the hollow valve L, so that water may pass into said valve.

' Although not absolutely necessary, I pro-4 vide the casing 7 with any suitable steamdome 9, into which extends'the pipe 10,

opening at its lower end into the chamber K" and provided with a check-valve llto prevent air escaping therethrough. lhe upper end of the pipe 10 is open and is provided with any suitable hood l2, by means of which only steam may ass theremto. From this description it wil be understood that I may use steam with the hot air if I find it of any advantage.

By means oiany suitable plug K ashes may be removed from the chamber y I do not confine myself to using my improvements-in engines only, nor do I confine myself to the construction herein shown and described, as same can be altered in many ways without departing from the spirit of my invention.

What'I claim as my invention is- .1. In a hot air engine, the combination with tbe cylinder provided with air-intake ports and an exhaust-portanti a motivefluidfeed-port, and piston Working in 'the cylinder,- of means for heating air fed into said cylinder through said feed-port, and a valve controlling said feed-port and opened by the pressure of air insaid cylinder.

2. In a hot air engine, the combination with the cylinder provided with air-intake ports and an exhaust-port and a motivefluid leedort, and piston working in thecylinder, o means for heating air fed into said cylinder throu l1 said feed-port, and a spring-controlled va ve controllin saio feedport, and opened by the pressure o air in said cylinder.

I 3. In a hot -lair engine, the combinationwith the cylinder provided with air-intake orts and an exhaust-port and a motive-fluid leed-port and piston working in the cylinder, of means for heating'air fed into said cylinder through said feed -port, and a valve controllin said feed-port. and opened by the pressure o1g air in said cylinder, the lower end of said valve normallyresting above the part of said feed-port immediately leading from` said cylinder, and normally below the other part of said feed-port between same and said heating means. Y

4. In a hotair engine, the combination with the cylinder provided with air-intake orts and an exhaust-port anda motive-fluid Feed-port and piston working in the cylinder, of means for-heating alr fed into said cylinder through said feed-port, and a s ring-controlled valve controlling 'said fee -port and opened by the pressure of air in said cylinder, the lower end of said valve normally resting above the partof said feed-port immediately leading from saidcylinder, and normally below the other part of said feed-port between same and said heating means.

5. In a hot-air engine, the combination with the cylinder provided with air-intake ports and an exhaust-port, and a motivefluid feedort opening from its head, the piston in sai( cylinder, and the crank-case provided with a valve-controlled `intake-port and a feed-port communicating with the in take-'ports ol' said cylinder,`of a combustion-l chamber connected to said cylinder by said first mentioned feed port; a spring controlled valve for controlling said iirst-men tioned feed-port, the lower end of said valve normally resting above the part of said firstmentioned feed-port immediately 'leading from said cylinder, and normally below thel other part of said first-mentioned feed-portA 4o inder, and normally between same and said combustion-chamber, and means for feeding fuel lnto sald combustion-chamber. l

6. In a hot-air engine, the combination 5 with the cylinder provided with air-intake ports and an exhaustort, and a motiveuid feed-port opening om its head, the piston in said cylinder, and the crank-case provided with a: valve-controlled intake-port xo and a feed-port communicating with the intake- Orts of said cvlinder, of a combustioncham er connecteu to said cylinder by said first-mentioned feedportj a spring-controlled valve for controlling said irst-menx 5 tioned feed-port, the lower end of said valve f .zo between same and said combustion-cham er;

means for limiting the movement of said spring-controlled valve and means for feeding fuel into s'aid combustion-chamber.

7. In a hot-air engine, the combination z5 with the cylinder provided with air-intake' ports and an exhaust-fport, and a motivef luidfeedort opening r .ton in sai cylinder, and the crank-case pro- D vided with a valve-controlled intake-port 3o and a feed-port communicating with the intakeerts .of sa'id cylinder o'a combustioncham er connected to said Zylinder by said first-mentioned feed-port; casing surrounding said combustion-chamber and designed to contain water; a spring-controlled valve for controlling said first-mentioned feedport, the lower end of said valve normally resting above the part of said first-mentioned feed-port immediat-el leading from said cylbelow the other part' of said first-mentioned feed-port between same and said combustion-chamber; means for limiting the movement of said spring-contrclled valve, and means for feeding fuel into said combustion-chamber.

8. In a hot-air engine, the combination withthe cylinder provided With/air-intake -ports and an exhaustort, and a motiveluid feedort opening om its head, the pis- 5o ton in sai cylinder, and the crank-case provided with a valvecontrolled intake-port om its head, the pis.

and a feed-port communicating with the intake-ports of said cylinder, of a combustionchamber connected to said cylinder by said first-mentioned feed-port; a casing surrounding said combustion-chamber and designed to contain Water; a spring-controlled hollow valve provided with openings through which the water may pass thereinto, for controlling said first-mentioned feed-port, the lower en of said valve normally resting above the part of said first-mentioned feed-port immediately leading` from said cylinder, and normally below the other part of said first-mentioned feed-port between same and said combustion-chamber; means for limiting the movement of said spring-controlled hollow valve, and means for feeding fuel into said combustion-chamber. l

9. In a hctair engine, the combination with the cylinder provided with air-intake ports and an kexhaustort, and a motiveuid feedort opening rom its head, the piston in sai cylinder, andthe crank-case provided with a valve-controlled intake-port and a feed-port communicating with the intake-ports of said cylinder, of a combustionchamber connected to said cylinder by said Erst-mentioned feed-port; a casing surrounding said combustion-chamber anddesi ed to contain water; a spring-controlled'ho low valve provided Withopenings through which the Watermay pass thereinto for controllinU said first-mentioned feed-port, the lower end of said valve normally resting above the part of said first-mentioned feed-port immediately below the other part of said rst-mentioned feed-port between same and said combustion-chamber; means for limiting the movement of said s' ring-controlled hollow valve means for feeding fuel into said combustion-chamber, and a pipe opening `into said combustion-chamber from said casing containing the water, and a check-valve in said pipe.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

WILLIAM RECHAB HONEYWELL.

Witnesses:

EeER'roN R. CASE, WILMor R. BLAGKHALL.' 

